"...The early catastrophe?" Billy revealed a terrified smile, the kind of smile worn by someone who had been searching for a raging lion to photograph from a safe distance, only for that very lion to suddenly appear out of nowhere directly in front of him and stare straight into his eyes. "...W-What... are you talking about?"
"It's something simple that happened a few decades ago, remember? Back when I brought my grandchildren here and handed out the gifts." Robin smiled faintly as he recalled the occasion and everything that had happened that day. "That day, I fought an Executioner, or what is known as an Ancestor of the Space Beasts."
Whoosh Robin casually extended his hand beside him, and it disappeared directly into the space there before he pulled a black arm out from between the folds of space, then Poof, tossed it onto the table in front of him as though it were nothing particularly noteworthy. "Remember this? It's the arm of that Ancestor of the Space Beasts."
